I want to change the awful colors they have chosen for messaging, gmail, etc. They made messaging an eye sore. And the orange/red color of gmail makes me want to write angry email all day. ITS RAGING BULL STATUS. Just downloaded and installed lollipop 5.0 a day ago and already I cant wait for 5.1. Lollipop needs work.
Do you mean the colors of the app icon? Which colors are you referring to exactly? You can't change those apps unfortunately. However, you should be able to change the personalization of messaging (such as backgrounds and bubbles) in settings. At least you can with Galaxy S III. Good luck [& stop being angry! ]